How can I remove duplicate dict in list in Python?

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I have a list of dicts, and I'd like to remove the dicts with identical key and value pairs.

For this list: [{'a': 123}, {'b': 123}, {'a': 123}]

I'd like to return this: [{'a': 123}, {'b': 123}]
Nov 19, 2018 in Python by Anirudh
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0 votes

You can preserve the Order, then you can do:

from collections import OrderedDict
print OrderedDict((frozenset(item.items()),item) for item in data).values()
# [{'a': 123, 'b': 1234}, {'a': 3222, 'b': 1234}]

If the order doesn't matter, then you can do:

print {frozenset(item.items()):item for item in data}.values()
# [{'a': 3222, 'b': 1234}, {'a': 123, 'b': 1234}]
answered Nov 19, 2018 by Nymeria
• 3,500 points

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